Question

a) Stiind ca a x b = 3 supra 7 si c = 14 supra 15 , calculati a x (b x c)
b) Stiind ca a x b = 21 supra 17 si c = 51 supra 14 , calculati (a x b ) x c
c) Stiind ca a x b = 42 supra 5 si c x d = 35 supra 77 , calculati a x (b x c) x d

x = ori
Multumesc anticipat ! Va rog , e urgent !

Answer 1

A)   a x b x c= 3/7  x 14/15=2/5

b) a x b x c= 21/17  x  51/14 =3/1 x 3/2=9/2

c) a x b x c x d = 42/5 x 35/77 = 6/1 x 7/11=42/11

Answer 2

a) a · b = 3 / 7 , c = 14 / 15 , a · (b · c) = ?
a · (b · c) = (a · b) · c = (3 / 7) · (14 / 15) = 2 / 5

b) a · b = 21 / 17 , c = 51 / 14 , (a · b) · c = ?
(a · b) · c = (21 / 17) · (51 / 14) = 9 / 2

c) a · b = 42 / 5 , c · d = 35 / 77 , a · (b · c) · d = ?
a · (b · c) · d = (a · b) · (c · d) = (42 / 5) · (35 / 77) = 42 / 11.